title: Brain dynamics of word familiarization in 20-month-olds: effects of productive vocabulary size.
abstract: The present study investigated the brain mechanisms involved during young children's receptive familiarization with new words, and whether the dynamics of these mechanisms are related to the child's productive vocabulary size. To this end, we recorded event-related potentials (ERPs) from 20-month-old children in a pseudoword repetition task. Results revealed distinct patterns of repetition effects for children with large and small productive vocabularies. High producers showed evidence of recognizing the novel words already after three presentations, while the low producers needed five presentations to display a recognition effect. The familiarization process was manifested in the modulations of two components, the N200-400 and a later fronto-central component, which appeared to increase in amplitude until a certain level of encoding was reached and then decrease with further repetition. These findings suggest a relation between the onset of the productive vocabulary spurt and the rate of receptive word familiarization.
authors.affiliation: Department of Linguistics and Scandinavian Studies, University of Oslo, Oslo, Norway. janneto@iln.uio.no
authors.forename: Janne von Koss
authors.initials: Jv
authors.lastname: Torkildsen
authors.forename: Hanna
authors.initials: H
authors.lastname: Friis Hansen
authors.forename: Janne Mari
authors.initials: JM
authors.lastname: Svangstu
authors.forename: Lars
authors.initials: L
authors.lastname: Smith
authors.forename: Hanne Gram
authors.initials: HG
authors.lastname: Simonsen
authors.forename: Inger
authors.initials: I
authors.lastname: Moen
authors.forename: Magnus
authors.initials: M
authors.lastname: Lindgren
mesh_terms: D000704:Analysis of Variance; D001245:Association Learning / Q000502:physiology; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials; D006801:Humans; D007223:Infant; D007804:Language Development; D014825:Vocabulary